But ten years later (635) the Dalmatians rose afresh, once more in concert with the Scordisci.

While the consul Lucius Cotta fought against the latter and in doing so advanced apparently as far as Segestica, his colleague Lucius Metellus afterwards named Dalmaticus, the elder brother of the conqueror of Numidia, marched against the Dalmatians, conquered them and passed the winter in Salona (Spalato), which town henceforth appears as the chief stronghold of the Romans in that region.

It is not improbable that the construction of the Via Gabinia, which led from Salona in an easterly direction to Andetrium (near Much) and thence farther into the interior, falls within this period.
The Romans Cross the Eastern Alps and Reach the Danube The expedition of the consul of 639, Marcus Aemilius Scaurus, against the Taurisci( 12) presented more the character of a war of conquest.
He was the first of the Romans to cross the chain of the eastern Alps where it falls lowest between Trieste and Laybach, and contracted hospitable relations with the Taurisci; which secured a not unimportant commercial intercourse without involving the Romans, as a formal subjugation would have involved them, in the movements of the peoples to the north of the Alps.

Of the conflicts with the Scordisci, which have passed almost wholly into oblivion, a page, which speaks clearly even in its isolation, has recently been brought to light through a memorial stone from the year 636 lately discovered in the neighbourhood of Thessalonica.

According to it, in this year the governor of Macedonia Sextus Pompeius fell near Argos (not far from Stobi on the upper Axius or Vardar) in a battle fought with these Celts; and, after his quaestor Marcus Annius had come up with his troops and in some measure mastered the enemy, these same Celts in connection with Tipas the king of the Maedi (on the upper Strymon) soon made a fresh irruption in still larger masses, and it was with difficulty that the Romans defended themselves against the onset of the barbarians.( 13) Things soon assumed so threatening a shape that it became necessary to despatch consular armies to Macedonia.( 14) A few years afterwards the consul of 640 Gaius Porcius Cato was surprised in the Servian mountains by the same Scordisci, and his army completely destroyed, while he himself with a few attendants disgracefully fled; with difficulty the praetor Marcus Didius protected the Roman frontier.